Heat exchanger with pressure directional control valve and air conditioner

Abstract

The application discloses a heat exchanger with a pressure direction valve and an air conditioner, and designs a pressure direction valve, a first heat exchange pipeline, a second heat exchange pipeline and a third heat exchange pipeline; the pressure direction valve comprises a valve seat and a valve core; the valve seat is internally provided with a valve cavity; the valve seat is provided with a first connecting port, a second connecting port, a third connecting port, a fourth connecting port, a first gas injection port and a second gas injection port; the valve core is movably arranged in the valve cavity, and divides the valve cavity into a first valve cavity and a second valve cavity; the first gas injection port is in communication with the first valve cavity, and the second gas injection port is in communication with the second valve cavity; the valve core is internally provided with a first flow channel and a second flow channel; when the valve core moves to a first limit position in a direction close to the first gas injection port, the pressure direction valve is in conduction; when refrigerant enters the heat exchanger from a gas pipe and refrigerant enters the heat exchanger from a liquid pipe, the on-off state of the pressure direction valve is different, and the refrigerant flow path in the heat exchanger is different.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically, it relates to a heat exchanger and an air conditioner with a pressure directional valve. Background Technology

[0002] Residential split-type air conditioners consist of an indoor unit and an outdoor unit; both the indoor and outdoor units have their own heat exchangers, and the refrigerant flows in the pipes of the heat exchangers, thereby achieving the transfer of heat between the indoor and outdoor air. Among them, heat pump air conditioners can switch between cooling and heating modes through a four-way valve module.

[0003] In traditional air conditioners, the refrigerant flow path in the heat exchanger is fixed. In cooling mode, it is a forward circulation, while in heating mode, the refrigerant flows in the reverse of the forward circulation in cooling mode.

[0004] Furthermore, air conditioners are equipped with one-way valves in the piping of the outdoor heat exchanger. The flow of refrigerant in the piping actuates the valve core, thus opening or closing the valve. However, the valve core frequently fails to activate, severely impacting the normal operation of the air conditioner. Summary of the Invention

[0005] This invention provides a heat exchanger with a pressure directional valve, which enables different refrigerant flow paths when the refrigerant enters the heat exchanger from the liquid pipe and when the refrigerant enters the heat exchanger from the gas pipe.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] A heat exchanger with a pressure directional valve includes:

[0008] A pressure directional valve includes a valve seat and a valve core; the valve seat has a valve cavity inside; the valve seat has a first connection port, a second connection port, a third connection port, a fourth connection port, a first air injection port, and a second air injection port; the valve core is movably disposed in the valve cavity and divides the valve cavity into a first valve cavity and a second valve cavity; the first air injection port communicates with the first valve cavity, and the second air injection port communicates with the second valve cavity; the valve core has a first flow channel and a second flow channel; when the valve core moves towards the first air injection port to a first limit position, the first connection port connects to the second connection port through the first flow channel, and the third connection port connects to the fourth connection port through the second flow channel;

[0009] trachea;

[0010] liquid pipe;

[0011] The first heat exchange pipeline has a first port connected to the gas pipeline, and a second port of the first heat exchange pipeline is connected to the first connection port of the pressure regulating valve, and the second connection port of the pressure regulating valve is connected to the liquid pipeline.

[0012] The second heat exchange pipeline has its first port connected to the fourth connection port of the pressure directional valve, and the third connection port of the pressure directional valve is connected to the gas pipe; the second port of the second heat exchange pipeline is connected to the first connection port of the pressure directional valve.

[0013] The third heat exchange pipeline has its first port connected to the fourth connection port of the pressure regulating valve, and its second port connected to the liquid pipe.

[0014] In some embodiments of this application, a first stop is provided on the inner wall of the valve cavity near the first air injection port to stop the valve core from continuing to move towards the first air injection port;

[0015] A second stop is provided on the inner wall of the valve chamber near the second air injection port to prevent the valve core from continuing to move towards the second air injection port.

[0016] In some embodiments of this application, the valve core includes a blocking portion and a conducting portion arranged along the axial direction of the valve core; the conducting portion has the first flow channel and the second flow channel described above;

[0017] When the valve core moves to the first limit position in the direction of approaching the first air injection port, the blockage part approaches the first air injection port, and the first flow channel connects the first connection port and the second connection port, and the second flow channel connects the third connection port and the fourth connection port;

[0018] When the valve core moves to the second limit position in the direction of approaching the second air injection port, the conducting part approaches the second air injection port, and the blocking part blocks the first connection port, the second connection port, the third connection port, and the fourth connection port.

[0019] In some embodiments of this application, the first air injection port is disposed at one end of the axial direction of the valve seat, and the second air injection port is disposed at the other end of the axial direction of the valve seat;

[0020] The first connection port and the second connection port are arranged opposite each other in the radial direction of the valve seat;

[0021] The third and fourth connection ports are arranged opposite each other in the radial direction of the valve seat;

[0022] The first flow channel is arranged radially along the valve core, and the second flow channel is also arranged radially along the valve core. The first flow channel and the second flow channel are spaced apart and arranged in parallel.

[0023] In some embodiments of this application, the valve seat, valve cavity, and valve core are all rectangular parallelepipeds.

[0024] In some embodiments of this application, the valve seat is horizontally disposed, and the valve cavity is horizontally disposed;

[0025] The first air injection port is located at the left end of the valve seat, and the second air injection port is located at the right end of the valve seat;

[0026] The first connection port and the third connection port are arranged side by side on the top of the valve seat;

[0027] The second and fourth connection ports are arranged side by side at the bottom of the valve seat.

[0028] In some embodiments of this application, the first heat exchange pipeline, the second heat exchange pipeline, and the third heat exchange pipeline are arranged sequentially from top to bottom.

[0029] In some embodiments of this application, the first heat exchange pipeline includes a plurality of heat exchange tubes connected in series, the second heat exchange pipeline includes a plurality of heat exchange tubes connected in series, and the third heat exchange pipeline includes a plurality of heat exchange tubes connected in series; the number of heat exchange tubes in the first heat exchange pipeline, the second heat exchange pipeline, and the third heat exchange pipeline are equal.

[0030] An air conditioner, comprising:

[0031] compressor;

[0032] The four-way valve has an exhaust valve port, an intake valve port, an indoor valve port, and an outdoor valve port; the exhaust valve port is connected to the exhaust pipe of the compressor, and the intake valve port is connected to the intake pipe of the compressor.

[0033] An indoor heat exchanger, the gas pipe of which is connected to the indoor valve port of the four-way valve;

[0034] An outdoor heat exchanger, which uses the aforementioned heat exchanger; the gas pipe of the outdoor heat exchanger is connected to the outdoor valve port of the four-way valve.

[0035] in,

[0036] The first air inlet of the pressure directional valve of the outdoor heat exchanger is connected to the outdoor side valve port of the four-way valve, and the second air inlet of the pressure directional valve is connected to the indoor side valve port of the four-way valve.

[0037] or,

[0038] The first air inlet of the pressure directional valve of the outdoor heat exchanger is connected to the indoor valve port of the four-way valve, and the second air inlet of the pressure directional valve is connected to the outdoor valve port of the four-way valve.

[0039] In some embodiments of this application, the first air inlet of the pressure directional valve is connected to the outdoor valve port of the four-way valve through a first capillary tube, and the second air inlet of the pressure directional valve is connected to the indoor valve port of the four-way valve through a second capillary tube.

[0040] or,

[0041] The first air inlet of the pressure directional valve is connected to the indoor valve port of the four-way valve through a first capillary tube, and the second air inlet of the pressure directional valve is connected to the outdoor valve port of the four-way valve through a second capillary tube.

[0042] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The heat exchanger and air conditioner of the present invention with a pressure directional valve are designed with a pressure directional valve, a first heat exchange pipeline, a second heat exchange pipeline, and a third heat exchange pipeline; the pressure directional valve includes a valve seat and a valve core; the valve seat has a valve cavity inside; the valve seat has a first connection port, a second connection port, a third connection port, a fourth connection port, a first air injection port, and a second air injection port; the valve core is movably disposed in the valve cavity, dividing the valve cavity into a first valve cavity and a second valve cavity; the first air injection port communicates with the first valve cavity, and the second air injection port communicates with the second valve cavity; the valve core has a first flow channel and a second flow channel; when the valve core moves towards the first air injection port to a first limit position, the pressure directional valve... The system is as follows: The first port of the first heat exchanger is connected to the gas pipe; the second port of the first heat exchanger is connected to the first connection port; the second connection port is connected to the liquid pipe. The first port of the second heat exchanger is connected to the fourth connection port; the third connection port is connected to the gas pipe. The second port of the second heat exchanger is connected to the first connection port. The first port of the third heat exchanger is connected to the fourth connection port; the second port of the third heat exchanger is connected to the liquid pipe. When the refrigerant enters the heat exchanger from the gas pipe and from the liquid pipe, the on / off state of the pressure regulating valve is different, resulting in different refrigerant flow paths within the heat exchanger. This effectively improves the cooling and heating effect, solving the problem of poor cooling and heating performance. Moreover, the pressure regulating valve is stable and reliable, ensuring stable and reliable operation of the heat exchanger.

[0043] Other features and advantages of the present invention will become clearer after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of a structure of a heat exchanger with a pressure directional valve proposed in this invention.

[0046] Figure 2 This is a schematic diagram of the flow path of refrigerant from the gas pipe into the heat exchanger;

[0047] Figure 3 This is an exploded view of one embodiment of a pressure directional valve;

[0048] Figure 4 This is a schematic diagram of the structure when the pressure directional valve is in operation;

[0049] Figure 5 This is a schematic diagram of the structure when the pressure directional valve is closed;

[0050] Figure 6 This is a schematic diagram of the heating cycle principle of the air conditioner proposed in this invention;

[0051] Figure 7 This is a schematic diagram of the refrigeration cycle principle of the air conditioner proposed in this invention.

[0052] Figure label:

[0053] 10. Compressor; 20. Four-way valve; 30. Indoor heat exchanger; 40. Throttling device;

[0054] 50. Outdoor heat exchanger; 51. Gas pipe; 52. Liquid pipe;

[0055] 53. First heat exchange pipeline; 54. Second heat exchange pipeline; 55. Third heat exchange pipeline;

[0056] 56. First capillary; 57. Second capillary;

[0057] 61. Valve seat;

[0058] 62. Valve chamber; 62-1. First valve chamber; 62-2. Second valve chamber;

[0059] 63. Valve core; 63-1. Blocking part; 63-2. Conducting part;

[0060] 63-2-1, First flow channel; 63-2-2, Second flow channel. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0062] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0063] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0064] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0065] To address the technical problem that current heat exchangers use the same refrigerant flow path when the refrigerant enters from the liquid pipe and when it enters from the gas pipe, this invention proposes a heat exchanger and air conditioner with a pressure directional valve. This achieves different refrigerant flow paths when the refrigerant enters the heat exchanger from the liquid pipe and when it enters from the gas pipe, thereby improving heat exchange capacity. Furthermore, the pressure directional valve is stable and reliable, ensuring stable operation of the heat exchanger. The heat exchanger and air conditioner with a pressure directional valve of this invention will be described in detail below with reference to the accompanying drawings.

[0066] Example 1

[0067] The heat exchanger 50 with a pressure directional valve in this embodiment includes a pressure directional valve V1, a gas pipe 51, a liquid pipe 52, a first heat exchange line 53, a second heat exchange line 54, a third heat exchange line 55, etc. (See also...) Figure 1 , Figure 2 As shown.

[0068] Pressure directional valve V1, which includes valve seat 61 and valve core 63, see [reference] Figures 3 to 5 As shown.

[0069] The valve seat 61 has a valve cavity 62 inside; the valve seat 61 has a first connection port A1, a second connection port A2, a third connection port A3, a fourth connection port A4, a first air injection port F1, and a second air injection port F2. The first connection port A1, the second connection port A2, the third connection port A3, the fourth connection port A4, the first air injection port F1, and the second air injection port F2 are all in communication with the valve cavity 62.

[0070] The valve core 63 is movably disposed within the valve cavity 62, and the valve core 63 divides the valve cavity 62 into a first valve cavity 62-1 and a second valve cavity 62-2; the first air injection port F1 is connected to the first valve cavity 62-1, and the second air injection port F2 is connected to the second valve cavity 62-2; the valve core 63 has a first flow channel 63-2-1 and a second flow channel 63-2-2.

[0071] The first gas inlet F1 and the second gas inlet F2 are connected to equipment that can provide gas pressure. For example, the first gas inlet F1 is connected to the high-pressure / low-pressure port of the equipment, and the second gas inlet F2 is connected to the low-pressure / high-pressure port of the equipment. The high-pressure / low-pressure gas from the equipment enters the first valve chamber 62-1 through the first gas inlet F1, and the low-pressure / high-pressure gas from the equipment enters the second valve chamber 62-2 through the second gas inlet F2. For example, when the heat exchanger 50 is used in an air conditioner, the first gas inlet F1 of the pressure regulating valve V1 is connected to the outdoor / indoor valve port of the four-way valve of the air conditioner, and the second gas inlet F2 is connected to the indoor / outdoor valve port of the four-way valve. The gas pressure in the first valve chamber 62-1 is different from the gas pressure in the second valve chamber 62-2.

[0072] When the air pressure in the first valve chamber 62-1 is less than the air pressure in the second valve chamber 62-2, the air pressure pushes the valve core 63 towards the first valve chamber 62-1 (i.e., towards the first air inlet F1 and away from the second air inlet F2). When the valve core 63 moves to its first limit position towards the first air inlet F1, the first connection port A1 connects to the second connection port A2 through the first flow channel 63-2-1, and the third connection port A3 connects to the fourth connection port A4 through the second flow channel 63-2-2. That is, the pressure directional valve V1 is activated. See [link / reference]. Figure 4 As shown.

[0073] When the air pressure in the first valve chamber 62-1 is greater than the air pressure in the second valve chamber 62-2, the valve core 63 is pushed to move towards the second valve chamber 62-2 (i.e., away from the first air inlet F1 and towards the second air inlet F2). When the valve core 63 moves to the second limit position towards the second air inlet F2, the valve core 63 blocks the first connection port A1, the second connection port A2, the third connection port A3, and the fourth connection port A4. That is, the first flow channel 63-2-1 is not connected to the first connection port A1 and the second connection port A2, and the second flow channel 63-2-2 is not connected to the third connection port A3 and the fourth connection port A4. In other words, the pressure directional valve V1 is closed. See below. Figure 5 As shown.

[0074] The first heat exchange pipeline 53 has its first port connected to the gas pipeline 51, its second port connected to the first connection port A1 of the pressure regulating valve V1, and the second connection port A2 of the pressure regulating valve V1 connected to the liquid pipeline 52.

[0075] The second heat exchange pipeline 54 has its first port connected to the fourth connection port A4 of the pressure directional valve V1, and its third connection port A3 connected to the gas pipe 51; the second port of the second heat exchange pipeline 54 is connected to the first connection port A1 of the pressure directional valve V1.

[0076] The third heat exchange pipeline 55 has its first port connected to the fourth connection port A4 of the pressure regulating valve V1, and its second port connected to the liquid pipe 52.

[0077] When refrigerant enters heat exchanger 50 from liquid pipe 52, if pressure directional valve V1 is activated, the refrigerant flowing out of liquid pipe 52 splits into two paths. The first path enters the third heat exchange pipe 55, flowing out to the fourth connection port A4, then into the second flow channel, and finally through the third connection port A3 to the gas pipe 51. The second path flows to the second connection port A2, then into the first flow channel, and out from the first connection port A1. The refrigerant out of the first connection port A1 splits into two paths: one path enters the second heat exchange pipe 54, flowing out to the fourth connection port A4, then through the second flow channel and the third connection port A3 to the gas pipe 51; the other path enters the first heat exchange pipe 53, flowing out of the first heat exchange pipe 53 into the gas pipe 51. (See also...) Figure 1 As shown.

[0078] It can be seen that when the refrigerant enters the heat exchanger 50 from the liquid pipe 52 and the pressure regulating valve V1 is turned on, the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55 are connected in parallel.

[0079] When refrigerant enters heat exchanger 50 from gas pipe 51, if pressure regulating valve V1 is closed, the refrigerant flowing out of gas pipe 51 first flows to the first heat exchange pipe 53, then flows out of the first heat exchange pipe 53 and then to the second heat exchange pipe 54, then flows out of the second heat exchange pipe 54 and then to the third heat exchange pipe 55. The refrigerant flowing out of the third heat exchange pipe 55 enters liquid pipe 52. (See below) Figure 2 As shown.

[0080] It can be seen that when the refrigerant enters the heat exchanger 50 from the gas pipe 51 and the pressure regulating valve V1 is closed, the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55 are connected in series.

[0081] Therefore, when the pressure directional valve V1 is open, the first heat exchange pipeline 53, the second heat exchange pipeline 54, and the third heat exchange pipeline 55 are connected in parallel; when the pressure directional valve V1 is closed, the first heat exchange pipeline 53, the second heat exchange pipeline 54, and the third heat exchange pipeline 55 are connected in series.

[0082] In this embodiment, the heat exchanger has different pressures at the first gas injection port F1 and the second gas injection port F2. When the refrigerant enters the heat exchanger 50 from the liquid pipe 52 or from the gas pipe 51, the pressure relationship between the first gas injection port F1 and the second gas injection port F2 is switched, thereby switching the gas pressure relationship between the first valve chamber and the second valve chamber, and thus changing the on / off state of the pressure regulating valve V1. That is, when the refrigerant enters the heat exchanger 50 from the liquid pipe 52 or from the gas pipe 51, the on / off state of the pressure regulating valve V1 is different, resulting in different flow paths for the refrigerant within the heat exchanger 50.

[0083] For example, when refrigerant enters heat exchanger 50 from liquid pipe 52, the pressure at the first gas injection port F1 is controlled to be less than the pressure at the second gas injection port F2, so that the pressure in the first valve chamber 62-1 is less than the pressure in the second valve chamber 62-2, thereby opening the pressure directional valve V1. When refrigerant enters heat exchanger 50 from gas pipe 51, the pressure at the first gas injection port F1 is controlled to be greater than the pressure at the second gas injection port F2, so that the pressure in the first valve chamber 62-1 is greater than the pressure in the second valve chamber 62-2, thereby closing the pressure directional valve V1.

[0084] Alternatively, when refrigerant enters heat exchanger 50 from gas pipe 51, the pressure at the first gas injection port F1 is controlled to be less than the pressure at the second gas injection port F2, so that the pressure in the first valve chamber 62-1 is less than the pressure in the second valve chamber 62-2, thereby opening the pressure regulating valve V1. When refrigerant enters heat exchanger 50 from liquid pipe 52, the pressure at the first gas injection port F1 is controlled to be greater than the pressure at the second gas injection port F2, so that the pressure in the first valve chamber 62-1 is greater than the pressure in the second valve chamber 62-2, thereby closing the pressure regulating valve V1.

[0085] The heat exchanger in this embodiment is designed with a pressure directional valve V1, a first heat exchange pipe 53, a second heat exchange pipe 54, and a third heat exchange pipe 55. The pressure directional valve V1 includes a valve seat 61 and a valve core 63. The valve seat 61 has a valve cavity 62 inside. The valve seat 61 has a first connection port A1, a second connection port A2, a third connection port A3, a fourth connection port A4, a first air injection port F1, and a second air injection port F2. The valve core 63 is movably disposed in the valve cavity 62, dividing the valve cavity 62 into a first valve cavity 62-1 and a second valve cavity 62-2. The first air injection port F1 communicates with the first valve cavity 62-1, and the second air injection port F2 communicates with the second valve cavity 62-2. The valve core 63 has a first flow channel 63-2-1 and a second flow channel 63-2-2 inside. When the valve core 63 moves to the first flow channel 63-2-1, it can adjust the flow direction of the valve core 63. When the refrigerant moves to its first limit position near the first gas injection port F1, the pressure directional valve V1 is activated; the first port of the first heat exchange pipeline 53 is connected to the gas pipeline 51, the second port of the first heat exchange pipeline 53 is connected to the first connection port A1, and the second connection port A2 is connected to the liquid pipeline 52; the first port of the second heat exchange pipeline 54 is connected to the fourth connection port A4, and the third connection port A3 is connected to the gas pipeline 51; the second port of the second heat exchange pipeline 54 is connected to the first connection port A1; the first port of the third heat exchange pipeline 55 is connected to the fourth connection port A4, and the second port of the third heat exchange pipeline 55 is connected to the liquid pipeline 52; when the refrigerant enters the heat exchanger 50 from the gas pipeline 51 and when the refrigerant enters the heat exchanger 50 from the liquid pipeline 52, the on / off state of the pressure directional valve V1 is different, resulting in different refrigerant flow paths. That is, the refrigerant flow path of heat exchanger 50 is different in cooling mode and heating mode, which can effectively improve the cooling and heating effect and solve the problem of poor cooling and heating effect; moreover, the pressure regulating valve is stable and reliable, ensuring the stable and reliable operation of heat exchanger 50.

[0086] In some embodiments of this application, a first stop is provided on the inner wall of the valve cavity near the first air injection port F1 to stop the valve core 63 from continuing to move closer to the first air injection port F1, thus preventing the valve core 63 from damaging the valve cavity 62. When the valve core 63 moves to the first limit position in the direction of approaching the first air injection port F1, the valve core 63 abuts against the first stop and no longer moves closer to the first air injection port F1.

[0087] A second stop is provided on the inner wall of the valve chamber near the second air injection port F2 to prevent the valve core 63 from continuing to move closer to the second air injection port F2, thus preventing the valve core 63 from damaging the valve chamber 62. When the valve core 63 moves to the second limit position in the direction of approaching the second air injection port F2, the valve core 63 abuts against the second stop and no longer moves closer to the second air injection port F2.

[0088] In some embodiments of this application, in order to improve the stability of the on / off state of the pressure directional valve V1, the valve core 63 includes a blocking part 63-1 and a conducting part 63-2 arranged along the axial direction of the valve core 63; the conducting part 63-2 has the first flow channel 63-2-1 and the second flow channel 63-2-2.

[0089] When the valve core 63 moves to the first limit position in the direction of approaching the first air injection port F1, the blocking part 63-1 approaches the first air injection port F1, the blocking part 63-1 abuts against the first stop part, and the first flow channel 63-2-1 connects the first connection port A1 and the second connection port A2, the second flow channel 63-2-2 connects the third connection port A3 and the fourth connection port A4, and the pressure regulating valve V1 is turned on.

[0090] When the valve core 63 moves to the second limit position in the direction of approaching the second air inlet F2, the conducting part 63-2 approaches the second air inlet F2, the conducting part 63-2 abuts against the second stop part, and the blocking part 63-1 blocks the first connection port A1, the second connection port A2, the third connection port A3, and the fourth connection port A4, and the pressure regulating valve V1 is closed.

[0091] In some embodiments of this application, in order to facilitate the processing and design of the valve seat 61, the first air injection port F1 is provided at one end of the axial direction of the valve seat 61, and the second air injection port F2 is provided at the other end of the axial direction of the valve seat 61; the first connection port A1 and the second connection port A2 are arranged opposite to each other in the radial direction of the valve seat 61; the third connection port A3 and the fourth connection port A4 are arranged opposite to each other in the radial direction of the valve seat 61.

[0092] To facilitate the machining and design of the valve core 63, the first flow channel 63-2-1 is arranged radially along the valve core 63, and the second flow channel 63-2-2 is also arranged radially along the valve core 63. The first flow channel 63-2-1 and the second flow channel 63-2-2 are spaced apart and arranged in parallel.

[0093] To further simplify the structure of the pressure directional valve V1, facilitate design, and make implementation easier, in some embodiments of this application, the valve seat 61, valve cavity 62, and valve core 63 are all rectangular parallelepipeds.

[0094] In some embodiments of this application, to avoid the influence of the weight of the valve core 63 on the on / off state of the pressure directional valve V1, the valve seat 61 is horizontally positioned, and the valve cavity 62 is horizontally positioned; the first air injection port F1 is located at the left end of the valve seat 61, and the second air injection port F2 is located at the right end of the valve seat 61; the first connection port A1 and the third connection port A3 are arranged side by side at the top end of the valve seat 61; the second connection port A2 and the fourth connection port A4 are arranged side by side at the bottom end of the valve seat 61; the top surface of the valve core 63 is in sliding contact with the top surface of the valve cavity 62; the bottom surface of the valve core 63 is in sliding contact with the bottom surface of the valve cavity 62, and the valve core 63 slides left and right within the valve cavity 62.

[0095] In some embodiments of this application, the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55 are arranged sequentially from top to bottom, so that the heat exchange uniformity of the entire heat exchanger 50 is good.

[0096] In some embodiments of this application, in order to further improve the heat exchange uniformity of the heat exchanger 50, the first heat exchange pipeline 53 includes a plurality of heat exchange tubes connected in series, the second heat exchange pipeline 54 includes a plurality of heat exchange tubes connected in series, and the third heat exchange pipeline 55 includes a plurality of heat exchange tubes connected in series; the number of heat exchange tubes in the first heat exchange pipeline 53, the second heat exchange pipeline 54, and the third heat exchange pipeline 55 are equal.

[0097] The heat exchanger 50 in this embodiment can be used as both an outdoor heat exchanger and an indoor heat exchanger when applied to an air conditioner.

[0098] Example 2

[0099] Based on the heat exchanger design in Embodiment 1, this Embodiment 2 proposes an air conditioner.

[0100] The air conditioner in this embodiment includes a compressor 10, a four-way valve 20, an indoor heat exchanger 30, a throttling device 40, an outdoor heat exchanger 50, etc. (See also...) Figure 6 , Figure 7 As shown; wherein, the outdoor heat exchanger 50 adopts the heat exchanger described in Embodiment 1. That is, the heat exchanger in Embodiment 1 is used as the outdoor heat exchanger of the air conditioner.

[0101] The compressor 10 has an exhaust pipe and an intake pipe.

[0102] The four-way valve 20 has an exhaust valve port, an intake valve port, an indoor valve port, and an outdoor valve port. The exhaust valve port is connected to the compressor's exhaust pipe, the intake valve port is connected to the compressor's intake pipe, the indoor valve port is connected to the gas pipe of the indoor heat exchanger, and the outdoor valve port is connected to the gas pipe of the outdoor heat exchanger. In heating mode, the exhaust valve port is connected to the indoor valve port, and the intake valve port is connected to the outdoor valve port. See [link / reference]. Figure 6 As shown; in cooling mode, the exhaust valve port is connected to the outdoor valve port, and the suction valve port is connected to the indoor valve port. See [link / reference]. Figure 7 As shown.

[0103] The indoor heat exchanger 30 has its gas pipe connected to the indoor side valve port of the four-way valve 20.

[0104] The outdoor heat exchanger 50 has its gas pipe 51 connected to the outdoor valve port of the four-way valve 20; the liquid pipe 52 of the outdoor heat exchanger 50 is connected to the liquid pipe of the indoor heat exchanger 40.

[0105] in,

[0106] The first air inlet F1 of the pressure directional valve V1 of the outdoor heat exchanger 50 is connected to the outdoor side valve port of the four-way valve 20, and the second air inlet F2 of the pressure directional valve V1 is connected to the indoor side valve port of the four-way valve 20.

[0107] or,

[0108] The first air inlet F1 of the pressure directional valve V1 of the outdoor heat exchanger 50 is connected to the indoor valve port of the four-way valve 20, and the second air inlet F2 of the pressure directional valve V1 is connected to the outdoor valve port of the four-way valve 20.

[0109] (i) In some embodiments of this application, the first gas injection port F1 of the pressure directional valve V1 of the outdoor heat exchanger 50 is connected to the outdoor side valve port of the four-way valve 20, and the second gas injection port F2 of the pressure directional valve V1 is connected to the indoor side valve port of the four-way valve 20; the gas at the outdoor side valve port of the four-way valve 20 enters the first valve chamber 62-1 through the first gas injection port F1, and the gas at the indoor side valve port enters the second valve chamber 62-2 through the second gas injection port F2.

[0110] In heating mode, the air pressure at the outdoor valve port of the four-way valve 20 is less than the air pressure at the indoor valve port. Therefore, the air pressure in the first valve chamber 62-1 of the pressure directional valve V1 is less than the air pressure in the second valve chamber 62-2, and the pressure directional valve V1 is open. See also Figure 6 As shown, in heating mode, pressure directional valve V1 is open, and the high-temperature, high-pressure gaseous refrigerant discharged from compressor 10 enters the exhaust port of four-way valve 20, then enters indoor heat exchanger 30 through indoor side valve port. The refrigerant flowing out of indoor heat exchanger 30 enters liquid pipe 52 of outdoor heat exchanger 50 through throttling device 40. The refrigerant flows from liquid pipe 52 into outdoor heat exchanger 50, and the refrigerant flowing out of liquid pipe 52 is divided into two paths. The first path of refrigerant enters third heat exchange pipe 55. The refrigerant flowing out of third heat exchange pipe 55 flows to the fourth connection port A4 of pressure directional valve V1, then enters the second flow channel, and flows through the third connection port A3. The refrigerant flows to the gas pipe 51; the second refrigerant flows to the second connection port A2, then enters the first flow channel, and flows out from the first connection port A1. The refrigerant flowing out from the first connection port A1 is divided into two paths. One path enters the second heat exchange pipe 54, and the refrigerant flowing out from the second heat exchange pipe 54 flows to the fourth connection port A4, then through the second flow channel and the third connection port A3 to the gas pipe 51; the other path enters the first heat exchange pipe 53, and the refrigerant flowing out from the first heat exchange pipe 53 enters the gas pipe 51. The refrigerant flowing out from the gas pipe 51 enters the outdoor valve port of the four-way valve 20, and then enters the compressor 30 through the suction valve port.

[0111] It can be seen that in heating mode, the pressure regulating valve V1 is open, and the first heat exchange pipeline 53, the second heat exchange pipeline 54, and the third heat exchange pipeline 55 are connected in parallel.

[0112] In cooling mode, the air pressure at the outdoor valve port of the four-way valve 20 is greater than the air pressure at the indoor valve port. Therefore, the air pressure in the first valve chamber 62-1 of the pressure directional valve V1 is greater than the air pressure in the second valve chamber 62-2, and the pressure directional valve V1 is closed. (See also...) Figure 7 As shown, in cooling mode, the pressure directional valve V1 is closed, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the exhaust valve port of the four-way valve 20, and then enters the gas pipe 51 of the outdoor heat exchanger 50 through the outdoor side valve port. The refrigerant flowing out of the gas pipe 51 first flows to the first heat exchange pipe 53, then flows out of the first heat exchange pipe 53 and then flows to the second heat exchange pipe 54, then flows out of the second heat exchange pipe 54 and then flows to the third heat exchange pipe 55. The refrigerant flowing out of the third heat exchange pipe 55 enters the liquid pipe 52. The refrigerant flowing out of the liquid pipe 52 enters the indoor heat exchanger 30 through the throttling device 40. The refrigerant flowing out of the indoor heat exchanger 30 enters the indoor side valve port of the four-way valve 20, and then enters the compressor 10 through the suction valve port.

[0113] As can be seen, in cooling mode, the pressure directional valve V1 is closed, and the first heat exchange pipeline 53, the second heat exchange pipeline 54, and the third heat exchange pipeline 55 are connected in series.

[0114] Therefore, during the heating cycle, the pressure directional valve V1 is in the open state, and the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55 are connected in parallel. During the cooling cycle, the pressure directional valve V1 is in the closed state, and the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55 are connected in series. In this embodiment, the on / off state of the pressure directional valve V1 is different in heating and cooling modes, resulting in different series and parallel connections of the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55. Consequently, the refrigerant flow path of the outdoor heat exchanger 50 is different, which can effectively improve the cooling and heating effects.

[0115] In some embodiments of this application, the first air inlet F1 of the pressure directional valve V1 is connected to the outdoor valve port of the four-way valve 20 through the first capillary tube 56, and the second air inlet F2 of the pressure directional valve V1 is connected to the indoor valve port of the four-way valve 20 through the second capillary tube 57. This method is simple, convenient, and low in cost.

[0116] (ii) In some embodiments of this application, the first gas injection port F1 of the pressure directional valve V1 of the outdoor heat exchanger 50 is connected to the indoor side valve port of the four-way valve 20, and the second gas injection port F2 of the pressure directional valve V1 is connected to the outdoor side valve port of the four-way valve 20; the gas at the indoor side valve port of the four-way valve 20 enters the first valve chamber 62-1 through the first gas injection port F1, and the gas at the outdoor side valve port enters the second valve chamber 62-2 through the second gas injection port F2.

[0117] In heating mode, the air pressure at the outdoor valve port of the four-way valve 20 is less than the air pressure at the indoor valve port. Therefore, the air pressure in the first valve chamber 62-1 of the pressure directional valve V1 is greater than the air pressure in the second valve chamber 62-2, and the pressure directional valve V1 is closed. In heating mode, the pressure directional valve V1 is closed, and the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 enters the exhaust port of the four-way valve 20, and then enters the indoor heat exchanger 30 through the indoor side valve port. The refrigerant flowing out of the indoor heat exchanger 30 enters the liquid pipe 52 of the outdoor heat exchanger 50 through the throttling device 40. The refrigerant flows from the liquid pipe 52 into the outdoor heat exchanger 50. The refrigerant flowing out of the liquid pipe 52 first flows to the third heat exchange pipe 55, then flows out of the third heat exchange pipe 55 and then flows to the second heat exchange pipe 54. The refrigerant flowing out of the second heat exchange pipe 54 then flows to the first heat exchange pipe 53. The refrigerant flowing out of the first heat exchange pipe 53 enters the gas pipe 51. The refrigerant flowing out of the gas pipe 51 enters the outdoor side valve port of the four-way valve 20, and then enters the compressor 30 through the suction valve port.

[0118] It can be seen that in heating mode, the pressure directional valve V1 is closed, and the first heat exchange pipeline 53, the second heat exchange pipeline 54, and the third heat exchange pipeline 55 are connected in series.

[0119] In cooling mode, the air pressure at the outdoor valve port of the four-way valve 20 is greater than the air pressure at the indoor valve port. Therefore, the air pressure in the first valve chamber 62-1 of the pressure directional valve V1 is less than the air pressure in the second valve chamber 62-2, and the pressure directional valve V1 is open. In cooling mode, with the pressure directional valve V1 open, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 10 enters the exhaust valve port of the four-way valve 20, and then enters the gas pipe 51 of the outdoor heat exchanger 50 through the outdoor valve port. The refrigerant flowing out of the gas pipe 51 is divided into two paths. The first path enters the first heat exchange pipe 53, and the refrigerant flowing out of the first heat exchange pipe 53 flows to the first connection port A1 of the pressure directional valve V1, then enters the first flow channel, and flows to the liquid pipe 52 through the second connection port A2. The second path flows to the third connection port A3, then enters the second flow channel, and flows from... The refrigerant flowing out of the fourth connection port A4 is divided into two paths. One path enters the second heat exchange pipe 54, and the refrigerant flowing out of the second heat exchange pipe 54 flows to the first connection port A1, and then flows through the first flow channel and the second connection port A2 to the liquid pipe 52. The other path enters the third heat exchange pipe 55, and the refrigerant flowing out of the third heat exchange pipe 55 enters the liquid pipe 52. The refrigerant flowing out of the liquid pipe 52 enters the indoor heat exchanger 30 through the throttling device 40, and the refrigerant flowing out of the indoor heat exchanger 30 enters the indoor side valve port of the four-way valve 20, and then enters the compressor 10 through the suction valve port.

[0120] It can be seen that in the cooling mode, the pressure regulating valve V1 is open, and the first heat exchange pipeline 53, the second heat exchange pipeline 54, and the third heat exchange pipeline 55 are connected in parallel.

[0121] Therefore, during the heating cycle, the pressure directional valve V1 is in the closed state, and the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55 are connected in series. During the cooling cycle, the pressure directional valve V1 is in the open state, and the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55 are connected in parallel. In this embodiment, the on / off state of the pressure directional valve V1 is different in heating mode and cooling mode, resulting in different series and parallel connection methods for the first heat exchange pipe 53, the second heat exchange pipe 54, and the third heat exchange pipe 55. Consequently, the refrigerant flow path of the outdoor heat exchanger 50 is different, which can effectively improve the cooling and heating effect.

[0122] In some embodiments of this application, the first air inlet F1 of the pressure directional valve V1 is connected to the indoor valve port of the four-way valve 20 through a first capillary tube, and the second air inlet F2 of the pressure directional valve V1 is connected to the outdoor valve port of the four-way valve 20 through a second capillary tube. This method is simple, convenient, and low in cost.

[0123] In this embodiment of the air conditioner, a pressure directional valve V1, a first heat exchange pipe 53, a second heat exchange pipe 54, and a third heat exchange pipe 55 are designed in the outdoor heat exchanger 50. The first port of the first heat exchange pipe 53 is connected to the gas pipe 51, the second port of the first heat exchange pipe 53 is connected to the first connection port A1, and the second connection port A2 is connected to the liquid pipe 52. The first port of the second heat exchange pipe 54 is connected to the fourth connection port A4, and the third connection port A3 is connected to the gas pipe 51. The second port of the second heat exchange pipe 54 is connected to the first connection port A1. The first port of the third heat exchange pipe 55 is connected to the fourth connection port A4, and the second port of the third heat exchange pipe 55 is connected to the liquid pipe 52. In this embodiment of the air conditioner, the on / off state of the pressure directional valve V1 is different in heating mode and cooling mode, resulting in different refrigerant flow paths in the outdoor heat exchanger 50. This can effectively improve the cooling and heating effect and solve the problem of poor cooling and heating effect. Moreover, the pressure directional valve is stable and reliable, ensuring the stable and reliable operation of the outdoor heat exchanger, so that the air conditioner can work normally and stably.

[0124] In this embodiment of the air conditioner, the first and second valve chambers of the pressure reversing valve are connected to the outdoor and indoor valve ports of the four-way valve. When switching between cooling and heating modes, the pressure relationship between the first and second valve chambers is switched, thereby enabling reliable and stable valve core reversing of the pressure reversing valve.

[0125] When an air conditioner is running, the refrigerant inside forms a high-pressure side (refrigerant in the compressor's discharge pipe) and a low-pressure side (refrigerant in the compressor's suction pipe). The pressure difference between the high-pressure and low-pressure sides creates a significant driving force. The four-way valve uses this pressure difference to switch between cooling and heating modes without experiencing internal valve core failure. The pressure directional valve uses this pressure difference to actuate its valve core, ensuring stable and reliable operation. Because of the four-way valve's valve core movement, the pressure directional valve's valve core can switch between connecting to high and low pressure, thus enabling the left and right movement of the valve core. Figure 6 As shown, in heating mode, the valve core of the four-way valve 20 moves to the left. The first valve chamber on the left side of the pressure directional valve is connected to the outdoor valve port of the four-way valve through the first capillary tube, and the second valve chamber on the right side of the pressure directional valve is connected to the indoor valve port of the four-way valve through the second capillary tube. The refrigerant pressure in the outdoor valve port is less than the refrigerant pressure in the indoor port. The valve core of the pressure directional valve moves to the left, and the pressure directional valve is turned on.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat exchanger with a pressure directional valve, characterized in that: include: A pressure directional valve includes a valve seat and a valve core; the valve seat has a valve cavity inside; the valve seat has a first connection port, a second connection port, a third connection port, a fourth connection port, a first air injection port, and a second air injection port; the valve core is movably disposed in the valve cavity and divides the valve cavity into a first valve cavity and a second valve cavity; the first air injection port communicates with the first valve cavity, and the second air injection port communicates with the second valve cavity; the valve core has a first flow channel and a second flow channel. When the valve core moves to the first limit position towards the first air inlet, the first connection port is connected to the second connection port through the first flow channel, and the third connection port is connected to the fourth connection port through the second flow channel; the first air inlet of the pressure regulating valve is connected to the outdoor valve port of the four-way valve of the air conditioner, and the second air inlet of the pressure regulating valve is connected to the indoor valve port of the four-way valve of the air conditioner; or, the first air inlet of the pressure regulating valve is connected to the indoor valve port of the four-way valve of the air conditioner, and the second air inlet of the pressure regulating valve is connected to the outdoor valve port of the four-way valve of the air conditioner. trachea; liquid pipe; The first heat exchange pipeline has a first port connected to the gas pipeline, and a second port of the first heat exchange pipeline is connected to the first connection port of the pressure regulating valve, and the second connection port of the pressure regulating valve is connected to the liquid pipeline. The second heat exchange pipeline has its first port connected to the fourth connection port of the pressure directional valve, and the third connection port of the pressure directional valve is connected to the gas pipe; the second port of the second heat exchange pipeline is connected to the first connection port of the pressure directional valve. The third heat exchange pipeline has its first port connected to the fourth connection port of the pressure regulating valve, and its second port connected to the liquid pipe. When the air pressure in the first valve chamber is less than the air pressure in the second valve chamber, the air pressure pushes the valve core to move towards the first air inlet and away from the second air inlet; when the valve core moves towards the first air inlet to the first limit position, the first connection port is connected to the second connection port through the first flow channel, and the third connection port is connected to the fourth connection port through the second flow channel, and the pressure directional valve is turned on. When the air pressure in the first valve chamber is greater than the air pressure in the second valve chamber, the air pressure pushes the valve core to move away from the first air inlet and towards the second air inlet; when the valve core moves towards the second air inlet to the second limit position, the valve core blocks the first connection port, the second connection port, the third connection port, and the fourth connection port, the first flow channel is not connected to the first connection port and the second connection port, the second flow channel is not connected to the third connection port and the fourth connection port, and the pressure directional valve is closed; The valve core includes a blocking portion and a conducting portion arranged along the axial direction of the valve core; the conducting portion has the first flow channel and the second flow channel. When the valve core moves to the first limit position in the direction of approaching the first air injection port, the blockage part approaches the first air injection port, and the first flow channel connects the first connection port and the second connection port, and the second flow channel connects the third connection port and the fourth connection port; When the valve core moves to the second limit position in the direction of approaching the second air injection port, the conducting part approaches the second air injection port, and the blocking part blocks the first connection port, the second connection port, the third connection port, and the fourth connection port.

2. The heat exchanger according to claim 1, characterized in that: A first stop is provided on the inner wall of the valve chamber near the first air injection port to stop the valve core from continuing to move towards the first air injection port. A second stop is provided on the inner wall of the valve chamber near the second air injection port to prevent the valve core from continuing to move towards the second air injection port.

3. The heat exchanger according to claim 1, characterized in that: The first air injection port is located at one end of the axial direction of the valve seat, and the second air injection port is located at the other end of the axial direction of the valve seat. The first connection port and the second connection port are arranged opposite each other in the radial direction of the valve seat; The third and fourth connection ports are arranged opposite each other in the radial direction of the valve seat; The first flow channel is arranged radially along the valve core, and the second flow channel is also arranged radially along the valve core. The first flow channel and the second flow channel are spaced apart and arranged in parallel.

4. The heat exchanger according to claim 1, characterized in that: The valve seat, valve cavity, and valve core are all rectangular parallelepipeds.

5. The heat exchanger according to claim 4, characterized in that: The valve seat is horizontally positioned, and the valve cavity is horizontally positioned. The first air injection port is located at the left end of the valve seat, and the second air injection port is located at the right end of the valve seat; The first connection port and the third connection port are arranged side by side on the top of the valve seat; The second and fourth connection ports are arranged side by side at the bottom of the valve seat.

6. The heat exchanger according to any one of claims 1 to 5, characterized in that: The first heat exchange pipeline, the second heat exchange pipeline, and the third heat exchange pipeline are arranged sequentially from top to bottom.

7. The heat exchanger according to any one of claims 1 to 5, characterized in that: The first heat exchange pipeline includes multiple heat exchange tubes connected in series, the second heat exchange pipeline includes multiple heat exchange tubes connected in series, and the third heat exchange pipeline includes multiple heat exchange tubes connected in series; the number of heat exchange tubes in the first heat exchange pipeline, the second heat exchange pipeline, and the third heat exchange pipeline are equal.

8. An air conditioner, characterized in that: include: compressor; A four-way valve has an exhaust valve port, an intake valve port, an indoor valve port, and an outdoor valve port; The exhaust valve port is connected to the exhaust pipe of the compressor, and the suction valve port is connected to the suction pipe of the compressor. An indoor heat exchanger, the gas pipe of which is connected to the indoor valve port of the four-way valve; An outdoor heat exchanger, which adopts the heat exchanger as described in any one of claims 1 to 7; the gas pipe of the outdoor heat exchanger is connected to the outdoor valve port of the four-way valve.

9. The air conditioner according to claim 8, characterized in that: The first air inlet of the pressure directional valve is connected to the outdoor valve port of the four-way valve through a first capillary tube, and the second air inlet of the pressure directional valve is connected to the indoor valve port of the four-way valve through a second capillary tube. or, The first air inlet of the pressure directional valve is connected to the indoor valve port of the four-way valve through a first capillary tube, and the second air inlet of the pressure directional valve is connected to the outdoor valve port of the four-way valve through a second capillary tube.

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